Push-on switch

Abstract

A push-on switch includes a casing made of insulating material and having an inner bottom surface. First fixed contacts are provided on the inner bottom surface of the casing. Second fixed contacts are provided on the inner bottom surface of the casing. Movable contacts have base portions and resilient contact arms. The base portions are placed on and electrically connected to the first fixed contacts respectively. The resilient contact arms extend from the base portions to regions above the second fixed contacts respectively. A dome-shaped spring member made of resilient insulating material has a top portion, a conical portion, and a lower end. The top portion and the lower end are connected by the conical portion. The lower end is placed on the base portions of the movable contacts. The top portion has a lower surface located above free ends of the resilient contact arms of the movable contacts. A lid member fixed to the casing has a hole through which the top portion of the dome-shaped spring member extends. The lid member presses the lower end of the dome-shaped spring member against the base portions of the movable contacts. As the top portion of the dome-shaped spring member is depressed, the dome-shaped spring member brings the resilient contact arms into contact with the second fixed contacts respectively.